[PATCH liburing 5/5] man/io_uring_prep_listen.3: Document IORING_OP_LISTEN operation

[Gabriel Krisman Bertazi <krisman@suse.de>]

Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
---
 man/io_uring_prep_listen.3 | 52 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 man/io_uring_prep_listen.3

diff --git a/man/io_uring_prep_listen.3 b/man/io_uring_prep_listen.3
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+.\" Copyright (C) 2024 SUSE LLC.
+.\"
+.\" SPDX-License-Identifier: LGPL-2.0-or-later
+.\"
+.TH io_uring_prep_listen 3 "Jun 3, 2024" "liburing-2.7" "liburing Manual"
+.SH NAME
+io_uring_prep_listen \- prepare a listen request
+.SH SYNOPSIS
+.nf
+.B #include <sys/socket.h>
+.B #include <liburing.h>
+.PP
+.BI "void io_uring_prep_listen(struct io_uring_sqe *" sqe ","
+.BI "                          int " sockfd ","
+.BI "                          int" backlog ");"
+.fi
+.SH DESCRIPTION
+The
+.BR io_uring_prep_listen (3)
+function prepares a listen request. The submission queue entry
+.I sqe
+is setup to place the socket file descriptor pointed by
+.IR sockfd
+into a state to accept incoming connections.  The parameter
+.IR backlog ,
+defines the maximum length of the queue of pending connections.
+
+This function prepares an async
+.BR listen (2)
+request. See that man page for details.
+
+.SH RETURN VALUE
+None
+.SH ERRORS
+The CQE
+.I res
+field will contain the result of the operation. See the related man page for
+details on possible values. Note that where synchronous system calls will return
+.B -1
+on failure and set
+.I errno
+to the actual error value, io_uring never uses
+.IR errno .
+Instead it returns the negated
+.I errno
+directly in the CQE
+.I res
+field.
+.SH SEE ALSO
+.BR io_uring_get_sqe (3),
+.BR io_uring_submit (3),
+.BR listen (2)
-- 
2.44.0